Improvement in machines for jointing and planing staves



2 Sheets- SheetI.

R w. GEORGE, Machines for jointing and Planing Staves.:

Patented May 27,4873.

AM. PHOTU-LITHDGRAPHIC 00. my (oasoR/vE's muons)- jointing the staves.

same.

UNITED STATES ROBERT w. GEORGE, OF BOSTON,MASSAGHUSETTS,ASSIGNOR ToCHARLES P. GEORGE, OF SAME PLACE.

IMPROVEMENT I N MACHINES FOR JO INTING ANDIPLANlNGSTAVES-IiSpecification forming part of Letters Patent No. 139,242, dated May 27,1873; application filed May 8, 1873.

new and useful Improvement in Machines for Planing and J ointing Staves,of which the following is a specification:

The Nature and Object of the Invention. The object of my invention is toembody in a single machine devices for planing and jointing staves.

The combination and construction of the devices can be best understoodby reference to the specification and drawing.

Description of the Drawing.

Figure 1 is a perspective view of my machine. Fig.2 is a plan of thesame. Fig. 3 is a longitudinal vertical section through the center ofthe machine. Figs. 4 and 5 show, in plan and elevation, the cam-wheelsfor regulating the position of the cutterheads for Fig. 6 is a sectionof the Fig. 7 is an elevation, showing the plate to which the jointingcutter heads are attached, and also the devices for adjusting the same.Fig. 8 is an elevation,showing one of the holding-dogs attached to thefeedchain.

General Description.

A A is the frame to which the various parts of my machine are attached.B B, Figs. 1, 2, and 3, is the plate or table of the machine on whichthe staves slide. 0 C, Fig. 2, is a slot extending centrally through theplate B. D,

. Figs. 2 and 3, represents one of the holdingdogs, of which there are anumber attached to the endless chain E. These dogs are formed as shownin Fig. 8, having a sharp prong or prongs, D for holding the end of thestave. These dogs come up through the opening 0, and, traversing thebed-plate along the longitudinal slot, pass down through at 0. At therear end of the dogs I place a cross-head, D Figs. 2 and 8, which,extending across the slot, rests upon the bed-plate, its object being tofeed the stave under the planers and between the jointers. The chain E Eis driven by the waste.

sprocket-wheel E, Fig. 3. My object in attaching a cross-head to thedogs, as shown in 1 Fig. 8, is to relieve the chain from a portion ofthe strain. It will be seen that the chain will be subject to an immensestrain when. forcing the stave forward while the cutters" 1 are actingupon it. On the forward part of 1 the dog I attach a cross-head, so asto run-ony1 each side of theslo't G O and against the bottom of the bedB, and at the rear end of the dogs I attach another cross-head bearingon each side of the slot and against the top of i the bed. It will beeasily seen :how these two: hearings will prevent any rocking motion ofthe dogs, and consequently any lifting of the chain. F F, Figs. 1 and 2,are guides attached to the slides F F forming, with other devices, T r aself-centering guide, each of these guides. having a rack-bar, F F,which engages with v the gear-wheel F so that when one guide, F,

moves in one direction the other guide F must I move the same distancein the opposite direction. A spring or springs is attached to the.

slides F F to hold the guides always toward the center. F F is anotherset of guides, 1 i i similarly constructed, which operate together inconnection with, the same device as that l used for the guides F F. Theobject of this N f ,1 invention is to center the stave-that is, cause 1the staves toenter between the jointer-heads equally-and thus take offan equal amount of stock from each side, and therefore avoid as theguides F FandF F Figs. land 2,

weights to give the desired pressure. H Figs. 1, 2, and 3, is arevolving planer cutterhead, having concave knives, so that the back ifof the stave, which is up, maybe planed to the required convexity andthickness. are rollers set below the bed-plate, and serve to press thestave upwardly against the guard K, Figs. 1, 2, and 3. E, Fig. 3, is arevolving planer cutter-head, with convex knives, which serve to planethe inner side of the stave into the required form. The revolving planercutterhead H is hung in a frame, H", Fig. 3, which is free to slidevertically. This frame is pivoted PATENT OFFICE.

The jointer-heads being set equal dis-. tance each side the center ofthe machine, and 1 to a lever, 11", which has its fulcrum atH, Figs. 1and 3.

The opposite end of the lever 11 embraces the eccentric H on the shaftK, Fig. 3, and as the shaft revolves it oscillates, moving with it theframe I1 and cutter-head H The eccentric H is adjustable on the shaft K,so that the time of the upward and downward movement of the cutter-headmay be regulated to agree with the passage of the stave, it beinglowest, while the ends of the stave are subject to its action, andhighest when the center of the stave passes over it, so that the centralpart of the stave will be thinnest. This mode of planing is advantageousin working thick staves, as it facilitates bending them with thetruss-hoop. T he jointers L N on the arbors L L, Fig. l, are hung inframes L L, one of which is shown in detail in Fig.7. The plateL L, Fig.7, is attached to the frame A of the machine by the rod or slides L Lwhich slide through brackets or projections from the frame, so that thewhole plate L L, with all its parts, including the jointer cutter-headsL is free to slide laterally in such manner as the motion of thecam-wheels K K require it to. L, Fig. 7, is a set-screw, for the purposeof varying the width of staves, as may be required, and is operated asfollows: The screw L is connected with sliding frame L, whose lateralmotion is governed by the cam-wheels L L acting against cam-guide K thisguide pressing against the set-screw L.

It will be seen that by turning the set-screw L against the cam-guide Kthe sliding frame L and all its attachments will be forced away from thecenter of the machine, thus giving a wider stave, and by slacking saidscrew the frame will be forced inwardly by the pressure of the weights Lthus giving a narrower stave.

L is a pointer attached to the sliding frame L, and serves to indicate,by the graduations on the frame L, the exact lateral position of thejointer L and, consequently, the width of stave being out. L is a secondframe attached to sliding frame L, and consists of the journals in whichthe jointing cutter-head shafts run. This frame is secured to thesliding frame L by means of a pivotpin placed opposite the center of thecutter-head shafts and at the end nearest the bed of the machine, andalso by means of two set-bolts, l I, Fig. 7, and working in slots, asshown. This pivot-pin is of great importance in changing the bevel ofthe stave, as I will proceed to show. Its object, as I have stated, isin connection with bolts 1 Z, Fig. 7, to enable the operator to obtainany bevel he may desire. The pih holds the head firm, and it is verylittle trouble to change. The jointer N 5 upon the opposite side of themachine is hung and operated in the same manner that L is hung andoperated,

- its outward motion being governed by the rod and boss L which pressesagainst the camguide K The cam-guides K K are constructed as follows: K,Fig. 6, is a flange having a large hub, K and fitted to shaft K, Fig. 1,in which a stationary splineis fitted, corresponding to a key-way, KFig. 5,in the flange-wheel K, Fig. 6 the object of the fixed spline isto always give the flange the same position on the shaft. On each sideof the flange, and on the hub of the same, is fitted cam-wheels K K Fig.6. The object of these disks is to regulate the cutting action of thejointers L N so that the stave may be jointed into the required shape orbilge. These disks or cams are held to each other and to the flange bymeans of bolts K K Fig. 5, passing through the slots K K. The bolts arebody-bound in the disks or cams and work loose'in the slots in theflange. The object in constructing this device is to vary the lengthsand bilges of the staves. The manner of varying the lengths of the staveis as follows: Each stave must be the same width at both ends, and inorder to have them so on this style of machine it is imperative that thecams should throw the jointer-heads widest apart at the exact time thatthe center of the stave is passing between them.

To secure this result,'and also to give a perfect barrel-stave, the dogsD on. the chain E are so placed as always to occupy a certain relativeposition in connection with the sprocket-wheel E, shaft K, and spline Kon the shaft K, and the graduations on the disk K. The point at whichthe disks attain their greatest throw is marked by an 0, Fig. 4.

Now, if the machine, j ointin g a thirty-six-inch stave, the O is setagainst 36 on the central disk E; if to joint a thirty-fourdnch stave itwill be necessary to change the cam-wheels, or one end of the staveswill be wider than the other. Now, to make good work, slacken the boltsK K Fig. 5, and turn the cams around so as to bring 34 opposite the0-point on the central flange, then tighten the bolts again and proceed.The operation is the same for any length required.

In regulating the machine for different bilges the adjustments will befound in Figs. 6 and 7, and are described as follows: K" K, Figs. 5 and6, are set-screws, placed near and at equal distances from the point ofgreatest throw of the cams. Of course, the more throw the cams have themore travel the jointerheads will have, and, consequently, the greaterthe bilge of the stave.

Now, to increase the bilge of a stave the operator merely slackens boltsK K Fig. 5, and then screws the set-screws K K against the centerstationary flange, and the throw side of the cam is forced away from theflange, and from each other, and the throw greatly increased, thusgiving more travel to the iointer-heads, and, of course, more bilge tothe stave. To obtain asmaller bilge slacken the set-screws K K andreduce the throw of the cams.

The adjustment of the planer H is effected by changing the position ofthe cam H", Fig. 3, on the shaft K, the principal adjustment being thesame as that already described for the jointer.

Having thus described my improved machine I will now give a briefdescription of its mode of operation.

Having adjusted the various parts, as heretofore explained, to suit thestyle of stave required, the operator takes the stave and places itbetween the guides F F and F E, Fig. 1, which, by yielding equally eachside, bring it centrally in the machine. The dogs D press against thestave and force it forward under the pressure rolls or springs H H, Fig.2, which hold it down against the bed of the machine. It then passesunder and is acted on by revolving cutter-head H, which gives the topside a convex shape. It continues on and passes between revolvingjointer cutterheads L N which, being forced outwardly bycams K K Fig. 1,and inwardly by weight Lf, Fig. 1, give both sides the required bilgeand bevel. It is then passed under bed E, Fig. 3, and over revolvingcutter-head H which gives the bottom side the required form.

What I claim as my invention is the follow- 2. In a stavejointingmachine, the compound adjustable cam K K Ki, operating substantially asdescribed, and for the pun.

pose set forth.

3. The combination of the planer cutter head H with the frame H 11 andthe eccentric H operating substantially as described,

and for the purpose set forth.

4. The self-centering guides F F and FF, Fig. 1, operating substantiallyas described, and for the purpose set forth.

5. The vibrating pivoted frame L carrying the cutter-head and shaft L Lin combination with the sliding frames L and cams K K substantially asand for the purpose specified.

6. The adjusting-screw L in combination with the sliding frame L andcams K K substantially as and for the purpose set forth.

7 The combination of the revolving cutterhead H feed-chainE,jointing-cutters L N cams K K and vertically-adjustable rotatingcutter-head H all being constructed and arranged as and for the purposeherein shown and described.

ROBERT W. GEORGE.

Witnesses:

J OSEPH T. PAGET, CHARLES P. GEORGE.

